Mesh Check Failed, Please Help!
 

When using FLUENT to check mech, there is an error message saying that "Warning: mech check failed". But it had passed the mesh check by using ICEM. Please advice. Thanks.

probably, skewness of your mesh is high

is that right?

yes, you are right.
thanks :)

same problem.

do i use a smaller mesh spacing?

If you are certain skewness is your problem, locate where your problem cells are located. Then you'll want to refine your mesh in those regions (as it is likely there is a cluster of highly skewed cells). Don't refine your entire mesh only to fix one small problem area as it will cut into computation time.